CURTMFG.COM
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PRODUCT SUPPORT: 877.287.8634
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16315-INS-RA
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03/31/2021
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ECN8138
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PAGE 2
Before you begin
Assembly includes measuring the height requirement for the 5th
wheel head in relation to the trailer ride height at the kingpin box and
skid plate. Ideally, the trailer should ride as near to level as possible.
The 5th wheel is adjustable from the truck bed to the top of its skid
plate. Adjustment is attained by adjusting the main body up or down,
in relation to the mounting system, in 1-1/4" increments (typical
clearance between the truck bed rails and the trailer should be a
minimum of 5-1/2"). Follow the next steps to measure.
Step 1
With the trailer on a firm and level surface, set chock blocks
in front of and behind the tires. (Do not substitute wood blocks,
rocks, etc. for chock blocks.) Extend front trailer lifting jacks,
adjust as required to set trailer at or near level.
Step 2
Measure from the ground to under the trailer's kingpin
box skid plate or lube plate, if used. This will be the portion
in contact with the 5th wheel's skid plate once coupled.
Step 3
Measure from the ground to the surface of the truck bed.
Subtract the measurement taken in Step 2 from Step 1.
This value will be near the height requirement for the 5th wheel.
CALCULATING HEIGHT
2
10
12
11
ASSEMBLY
3
4
5
8
7
1
9
6
Parts List
Item Qty Description
1
1
Main body / Head assembly
2
1
Handle assembly
3
1
Handle lock bar
4
2
Button head cap screw,
M8 - 1.25" x 30
5
2
Lock washer, M8
6
1
Latch spring
7
4
Hex bolt, M14
8
4
Lock washer, M14
9
4
Flat washer, M14
10
4
Nylock nut, M14
11
4
Base rail mounting clip
12
4
Base rail mounting pin, 1/2"
NOTICE
Visit
www.curtmfg.com
for a full-color copy of this instruction manual, as well as helpful videos, guides and much more!
Before you begin installation, read all instructions thoroughly.
Proper tools will improve the quality of installation and reduce the time required.
Periodic inspection of your product should be performed to ensure all hardware and / or components remain secure.
To help prevent damage to the product or vehicle, refer to the specified torque specifications when securing hardware during the installation process.